Having the shape of fan or concertina, with a row of sheets alternately folded backwards and forwards.
The problem appears to have started when a guide wire became hung up on one of the long hinges that join the fanfold panels of the array.2007 November 1, John Schwartz, “Repairing Solar Array Is New Focus of Spacewalk”, in New York Times:
fanfold
verb
Etymology From fan + fold.
1
To fold in this manner.
When the top sheet, blanket, and bedspread of a closed bed are turned back, or fanfolded, the closed bed becomes an open bed, or a bed ready to receive a patient or resident.2005, Pamela J. Carter, Susan Lewsen, Lippincott's Textbook for Nursing Assistants, page 277: